Genprex, Inc. announced the expansion of its nonclinical programs into new indications through Sponsored Research Agreements and Material Transfer Agreements with multiple academic research collaborators to study TUSC2, the tumor suppressor gene used in Genprex's lead drug candidate, REQORSA (quaratusugene ozeplasmid), and NPRL2, another tumor suppressor gene. The new indications being evaluated include ALK-positive lung cancer and other additional programs that are not disclosed at this time. ALK-EML4 positive translocated lung cancer is a subset of non-small cell lung cancer (NSCLC) that impacts young and relatively healthy individuals.

Since the discovery of the ALK-EML4 translocation, there has been research into targeting and treating this malignancy, which has led to approval by the U.S. Food and Drug Administration (FDA) of various ALK-targeted therapies including crizotinib, alectinib and lorlatinib. Although these compounds provide significant benefit in treating ALK-EML4-driven malignancies initially, resistance ultimately develops. The 5-year survival rate of ALK-EML4 translocated lung cancers is 40.9%, which is higher than other types of lung cancer but believe leaves substantial room for improvement.

TUSC2 is a tumor suppressor gene that is frequently deleted in lung cancer. In fact, approximately 82% of all NSCLCs lack or express decreased amounts of TUSC2 tumor suppressor protein. ALK translocations are found in approximately 5% of NSCLCs.

Research collaborators at the Rogel Cancer Center's Judith Tam ALK Lung Cancer Research Initiative are studying the combination of Genprex's REQORSA, which uses the TUSC2 tumor suppressor gene, with various ALK inhibitors. An abstract submitted by these researchers was accepted for presentation at the 2024 AACR Annual Meeting.